INTEL C COMPILER AMD CODE
Intel (icc, icpc, ifort) usually gives fastest code on Intel architecture).
INTEL C COMPILER AMD SOFTWARE
HPC software is traditionally written in Fortran or C/C++.
So, line 13 should be changed from for(size_t i=0 i.stf Looking at this function, we see that the loop stops at children.size() instead of children.size()-1. When DDT stops on the segmentation fault, the stack is in the YAML_Element::~YAML_Element function of YAML_Element.cpp. Then recompile and run with ARM DDT: make clean make Set compiler flags -O0 -g to CPP_OPT_FLAGS in Makefile. Please see tthe FAQ page for debugging suggestions This typically referes to a problem with your application.
YOUR APPPLICATIN TERMINATED WITH EXIT STRING: Segmentation fault (signal 11) = YOU CAN IGNORE THE BELOW CLEANUP MESSAGES = BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES You should have received the following error message at the end of the program output: To run an MPI program from the command line: ddt -offline -np num.procs. To run a non-MPI program from the command line: ddt -offline -no-mpi. It can be loaded on all OSC clusters: module load arm-ddt To see compiler warnings and diagnostic options: icc -help diag man gccĪRM DDT is a commercial debugger produced by ARM. For example: icc -g -o mycode.c gcc -g -O0 -o mycode mycode.c You need to load intel 19.0.5 and mvapich2 2.3.3: module load intel/19.0.5 mvapich2/2.3.3ĭebuggers let you execute your program one line at a time, inspect variable values, stop your programming at a particular line, and open a core file after the program crashes.įor debugging, use the -g flag and remove optimzation or set to -O0. Where nx, ny, nz are the number of nodes in the x, y, and z dimension on each processor.įirst start an interactive Pitzer Desktop session with OnDemand. CG is an iterative algorithm to numerically approximate the solution to a system of linear equations. It performs the Conjugate Gradient (CG) on a 3D chimney domain. We will be using code based on the HPCCD miniapp from Mantevo. Use of an appropriate file system for file I/O.Mmory access patterns (memory access is slow compared to computation).Effective use of processor features for a high degree of internal concurrency in a single core.Some factors that can affect performance are: Keep in mind that correctness of results, code readability/maintainability, and portability to future systems are more important than performance. This tutorial goes over techniques to tune the performance of your application.